[Chemical constituents from the mangrove plant Ceriops tagal].

AIM: To investigate the secondary metabolites of the mangrove plant Ceriops tagal. METHODS: Column chromatography techniques including HPLC were used for the separation and purification, and extensive spectral analysis including various 2D NMR spectra were employed for structure elucidation. RESULTS: Nine compounds, namely, tagalsins A (1), ent-5alpha-dolabr-4 (18) -ene-15S,16-diol (2), squalene (3), betulinic acid (4), lup-20 (29) -en-3-on-28-oic acid (5), betulin (6), lup-20 (29) -en-3-on-28-ol (7), beta-sitosterol (8), n-hexacosanylferulate (9) were obtained. Of which 1 and 2 belong to dolabrane diterpene. CONCLUSION: Compound 1 is a new compound, and 2 to 9 are isolated from this species for the first time.